Kumush nitratning 60В°C da 1250 g toyingan eritmasini 10В°C gacha sovuti

A) 730
B) 710
C) 570
D) 720
E) 507 7. <02-3-28) 80В°C da kaliy yodidning 146 g toyingan eritmasi 20В°C gacha sovutilganda necha gramm kristall ajralib chiqadi? [S20 = 144 g, S80 = 192 g] A) 24 B) 26 C) 34 D) 36 E) 38 8. (02-6-47) Ammiakning 20В°C dagi eruvchanligi 1 ml suvda 702 ml ga teng boladi. Toyingan eritmadagi ammiakning massa ulushini (%) hisoblang. Ammiakning bosimini normal atmosfera bosimiga teng deb oling. A) 25,6 B) 34,8 C) 35,0 D) 17,1 E) 24,2 9. (02-7-47) Kaliy karbonat tuzining 25В°C dagi eruvchanligi 112,3 ga teng bolsa, uning shu haroratdagi toyingan eritmasiriing (p= 1,567 g/ml) molyar konsentratsiyasini hisoblab toping. A) 0,5 B)1,0 C)3,0 D) 6,0 E) 2,0 10. (02-9-37) Temperatura ortishi bilan tuzlarning eruvchanligi ham ortadi. Tuzlarning erish issiqligi qanday boladi? A) AH > 0 Р’) AH < 0 C) AH = 0 D) AH < 0 E) AH > 0 11. (02-9-57) Qattiq moddalarning eruvchanligi qanday omillarga bogliq? 1) temperaturaga; 2) bosimga; 3) katalizatorga; 4) erituvchining tabiatiga; 5) erigan moddaning tabiatiga. A) 1,3, 4 B) 2, 3, 4 C) 1,2,3 D) 1,4, 5 E) 1, 2, 4, 5 12. (02-12-30) Vodorod bromidning n. sh. da suvdagi eruvchanligi 221 g. Shunday sharoitda bir hajm suvda necha hajm vodorod bromid eriydi? A)611 B)620 C)711 D)720 E) 511 13. (03-1-52) 20% li 200 ml (p = 1,19 g/ml) KOH eritmasiga 16% li 200 ml (p = 1,11 g/ml) H2S04 kislota eritmasi qoshildi. Eritma 10В° gacha sovutilganda, 28 g chokma tushdi. 10В°C da eritmadagi tuzning massa ulushini (%) aniqlang. A) 3,2 B) 5,4 C) 8,1 D) 12,5 E) 15,3 14. (03-5-40) Harorat ortishi bilan tuz eruvchanligining ortishi qanday jarayonga bogliq boladi? 1) tuz eriganda, issiqlik chiqishi; 2) tuz eriganda, issiqlik yutilishi; 3) tuz eriganda, haroratning ozgarmasligi. A) 1,2 B)1,3 C) 2, 3 D) 2 E) 1 15. (03-5-41) Erishda boladigan qanday jarayon tufayli harorat ortganda, moddaning eruvchanligi kamayadi? 1) modda eriganda, issiqlik yutilishi; 2) modda eriganda, issiqlik chiqishi; 3) modda eriganda, haroratning ozgarmasligi. A) 1 B) 2 C) 1, 2 D) 1, 3 E) 2, 3 16. (03-5-44) 20В°C da 545 g bariy nitrat eritmasida 45 g tuz erigan bolsa, shu haroratdagi bariy nitratning eruvchanligini toping. A) 12,2 B) 8,3 C)6,3 D) 15,2 E) 18,8 1